/*
 * Copyright (C) 2018 The Sylph Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package ideal.common.jvm;

import java.io.Serializable;
import java.util.Optional;

public class VmFuture<V extends Serializable>
        implements Serializable
{
    private V result;
    private String errorMessage;

    public Optional<V> get()
    {
        return Optional.ofNullable(result);
    }

    public String getOnFailure()
    {
        return errorMessage;
    }

    public VmFuture(Serializable result)
    {
        this.result = (V) result;
    }

    public VmFuture(String errorMessage)
    {
        this.errorMessage = errorMessage;
    }

    public VmFuture(Serializable result, String errorMessage)
    {
        this.errorMessage = errorMessage;
    }

    static <V extends Serializable> VmFuture<V> make(Serializable result, String errorMessage)
    {
        return new VmFuture<>(result, errorMessage);
    }
}
